Coupling of CO 2 and Ice Sheet Stability Over Major Climate Transitions of the Last 20 Million Years-Reference-Cited by-同舟云学术

Coupling of CO 2 and Ice Sheet Stability Over Major Climate Transitions of the Last 20 Million Years

Published:2009-12-04 Issue:5958 Volume:326 Page:1394-1397
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Tripati Aradhna K.¹²,Roberts Christopher D.²,Eagle Robert A.³

Affiliation:

1. Departments of Earth and Space Sciences and Atmospheric and Oceanic Sciences, and Institute of Geophysics and Planetary Physics, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.

2. Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UK.

3. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.

Abstract

CO 2 and Miocene Climate Change Atmospheric carbon dioxide is a powerful greenhouse gas believed to be one of the most important determinants of climate. Ice cores provide a detailed and direct record of CO 2 concentrations over the past 800,000 years, but not earlier. Tripati et al. (p. 1394 , published online 8 October) report B/Ca measurements of planktonic foraminifera, from which they can infer atmospheric CO 2 concentrations, for the past 20 million years. The concentration of atmospheric CO 2 was similar to preindustrial values for the past 10 millions years, but between 15 and 20 million years ago, during the warm lower Miocene epoch, CO 2 was more abundant, and major climate transitions toward cooler conditions occurred when CO 2 decreased substantially.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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